Materials Literature
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This paper describes the dependence of microstructure of NiTi shape memory alloy on the conditions of nonconventional powder metallurgy processing routes - reactive sintering of compressed Ni+Ti powder mixture and mechanical alloying with consequent compaction by Spark Plasma Sintering. First method was chosen as the…
The inhibition of the corrosion of N80 steel in 3.5 wt.% NaCl solution saturated with CO2 by the extract of Zanthoxylum schinifolium (ZSE) has been studied using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Inhibition effici…
Poly(3-hydroxybutyrate- co -3-hydroxyhexanoate) (PHBHHx) was melt-foamed using a single screw extrusion process and found to be susceptible to cell coalescence at the higher processing temperatures used for achieving low bulk density. The addition of poly(3-hydroxybutyrate- co -3-hydroxyvalerate) (PHBV) allowed for th…
This paper presents a new phenomenological model for magnetic shape memory (MSM) alloy actuators. The model was implemented as a lumped element for multi-domain network models using the Modelica language. These network models are rapidly computed and are therefore well suited for MSM-based actuator design and optimiza…
The intensive up-conversion (UC) photoluminescence and temperature sensing behavior of Er 3+-doped Bi 7 Ti 4 NbO 21( BTN ) ferroelectric ceramics prepared by a conventional solid-state reaction technique have been investigated. The X-ray diffraction and field emission scanning electron microscope analyses demonstrated…
The critical values of the Cockcroft-Latham and Ayada criteria, which are embedded in the Deform-3D software package and can be used to describe the fracture of nanocrystalline beryllium at various stages of warm rolling, are determined. It is shown that excess over these critical values leads to the fracture of beryl…
Nanotechnology offers potential in pharmaceuticals and biomedical developments for improving drug delivery systems, medical imaging, diagnosis, cancer therapy, and regenerative medicine. Although there is no international regulation or legislation specifically for nanomedicine, it is agreed worldwide that considerably…
Selenium and zinc are used as anionic and cationic dopant elements to dope PbS nanostructures. The undoped and doped PbS nanostructures are grown using a thermal evaporation method. Scanning electron microscopy (SEM) results show similar morphologies for the undoped and doped PbS nanostructures. X-ray diffraction (XRD…
Elastic cylindrical shells are fitted with an internal mechanism which is optimized so that, in the quasi-static regime, the combined system exhibits prescribed effective acoustic properties. The mechanism consists of a central mass supported by an axisymmetric distribution of elastic stiffeners. By appropriate select…
Single crystal diamond is widely used in high-tech fields for its remarkable performance on mechanics, calorifics, optics, acoustics, etc. High-quality diamond surface with small roughness and low scathe are required in these applications. However, the extreme hardness and high chemical inertness of diamond result in…
The adhesive strength of compounds based on epoxy resin ED-20 with the TEAT and PEPA hardeners is determined by pullout testing before and after administering shungite (20 wt %) as filler in their composition. The results of structural studies of the samples after the tests, which allowed determining the fracture type…
The diffraction anomalous fine structure (DAFS) method that is a spectroscopic analysis combined with resonant X-ray diffraction enables the determination of the valence state and local structure of a selected element at a specific crystalline site and/or phase. This method has been improved by using a polycrystalline…
Iron oxide (Fe2O3) is widely used as a catalyst, pigment and gas sensitive material. In this article, α-Fe2O3 nano-rods were first synthesized via a simple chemical method using iron(III) nitrate 9- hydrate (Fe(NO3)3.9H2O) as precursor. XRD pattern showed that the iron oxide nanoparticles exhibited alpha-Fe2O3 (hemati…
A cobalt(III) corrole, represented as ( Cl2Ph )3CorCo ( PPh3), where ( Cl2Ph )3Cor is the trianion of 5,10,15-tri(2,4-dichlorophenyl)corrole, was synthesized and characterized as to its electrochemical and spectroelectrochemical properties. Single-crystal structure analysis showed the corrole to be monoclinic and have…
Experiments were conducted on two commercial alloys, a Cu–0.1%Zr alloy and an Al-7075 aluminum alloy, to investigate the significance of the saturation microstructure which is achieved after processing by high-pressure torsion (HPT). Samples were processed by HPT and also by a combination of equal-channel angular pres…
The inhibition of under deposit corrosion (UDC) of steel X-60 (UNS K03006) was studied under field-collected sludge deposits in a simulated sour environment by means of linear polarization resistance (LPR), coupled multi-electrode array system (CMAS), and weight-loss coupons. X-ray diffraction (XRD) and energy-dispers…
Design diagrams are given based on which engineering models are developed allowing one to calculate the characteristics of interfacial layers of polymer composite materials are given. Theoretical and experimental investigations of interfacial layer thicknesses are comparatively evaluated.
The most commonly used materials in high-power devices such as electrochemical capacitors and super-capacitors studies include the transition metal oxides. We use simple and economically viable Chemical Bath Deposition (CBD) methods for the growth of nanocrystalline nickel-cobalt oxides (NiO-CoO) thin films. The NiO-C…
The Ultra High Frequency (UHF) signal radiated during the surface discharge process under harmonic AC voltages with different Total Harmonic Distortion (THD) shows a dominant frequency at 0.8 GHz. The surface discharge inception voltage decreases with an increase in harmonics and THD as observed in the present work. T…
Novel waterborne polymeric materials based on renewable resource monomers have been prepared by the environmentally friendly miniemulsion polymerization of an oleic acid-derivative monomer (MOA) and the α-methylene-γ-butyrolactone (α-MBL). The effect of the incorporation of different amounts of α-MBL on kinetics and p…